wing mirror
US /ˈwɪŋ ˌmɪr.ər/
UK /ˈwɪŋ ˌmɪr.ər/

1.
後視鏡
a mirror on the outside of a vehicle, typically on the side of the driver and passenger, that allows the driver to see the area to the side and rear of the vehicle
:
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He adjusted his wing mirror before pulling out of the parking spot.
他把後視鏡調好,然後才把車開出停車位。
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The car's wing mirror was damaged in the accident.
汽車的後視鏡在事故中損壞了。